[PATCH u-boot v2019.04-aspeed-openbmc 09/11] clk: aspeed: Add HACE yclk to ast2600

[Joel Stanley]

Signed-off-by: Joel Stanley <joel at jms.id.au>
---
 drivers/clk/aspeed/clk_ast2600.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/clk/aspeed/clk_ast2600.c b/drivers/clk/aspeed/clk_ast2600.c
index 4c00008a5dfd..ba9a0a0a9a5a 100644
--- a/drivers/clk/aspeed/clk_ast2600.c
+++ b/drivers/clk/aspeed/clk_ast2600.c
@@ -1066,6 +1066,25 @@ static ulong ast2600_enable_usbbhclk(struct ast2600_scu *scu)
 	return 0;
 }
 
+/* also known as yclk */
+static ulong ast2600_enable_haceclk(struct ast2600_scu *scu)
+{
+	u32 reset_bit;
+	u32 clkstop_bit;
+
+	reset_bit = BIT(ASPEED_RESET_HACE);
+	clkstop_bit = BIT(13);
+
+	writel(reset_bit, &scu->sysreset_ctrl1);
+	udelay(100);
+	writel(clkstop_bit, &scu->clk_stop_clr_ctrl1);
+	mdelay(20);
+
+	writel(reset_bit, &scu->sysreset_clr_ctrl1);
+
+	return 0;
+}
+
 static int ast2600_clk_enable(struct clk *clk)
 {
 	struct ast2600_clk_priv *priv = dev_get_priv(clk->dev);
@@ -1104,6 +1123,9 @@ static int ast2600_clk_enable(struct clk *clk)
 		case ASPEED_CLK_GATE_USBPORT2CLK:
 			ast2600_enable_usbbhclk(priv->scu);
 			break;
+		case ASPEED_CLK_GATE_YCLK:
+			ast2600_enable_haceclk(priv->scu);
+			break;
 		default:
 			pr_debug("can't enable clk \n");
 			return -ENOENT;
-- 
2.30.2